Apparatus for screening coal.



W. K. MONROE.

APPARATUS FOR SCREENING c0111. APPLICATION FILED 1213.4, 1911 1,023,582, Patented Apr. 16, 1912.

SSHEETS-SHEET 1.

Witne'ses: I 1 By 4 611 Attorney W. K. MONROE.

APPARATUS FOR SCREENING GOAL.

APPLIGATIONFILBD FEB.4,,1911.

1,023,582. Patented Apr. 16, 1912.

3 SHEETS-SHEET 2 Wltne 50s: 4 v Inventors v Attorney w. K. MONROE. APPARATUS FOR SCREENING COAL.

APPLICATION FILED FEBA, 1911 1,023,582. N Pat nt d Apr.16,1912.

3 SHEETS-SHEET 3 Witnesses: Inventors v y g g Mtorney pins are leans en.

WILL K. MONROE, F CLEVELAND, OHIO, ASSIGNOR TO THE BROWN HOISTING- MACHINERY COMPANY, OF CLEVELAND, OHIO.

APPARATUS FOR SCREENING COAL.

Specification of Letters Patent.

Patented Apr. is, rain.

Application filedFebruary 4, 1911. Serial No. 606,628.

To all whom z't may concern:

Be it known that I, WILL K. Mormon, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a new and useful Apparatus for Screening Goal, of which the following is a full, clear, and exact description, wherein reference is made to various parts, shown in the drawings accomid panylng this application, by the same letter or numeral in each instance. The improvement relates to and is designed more especially for screening bitu' minous coal at docks, yards and similar 5 points or places from which it is to be later transhipped in the several sizes or grades required for trafic, manufacturing, and domestic uses. These sizes or grades have each a relative demand, and market designation or trade name, respectively, of lump,

stove, nut and screenings, and, at.

present are derived from run-ofithe-mine or pile lots by elevating these masses or lots to given heights one or more times according .2 to the sizes tobe separated, and then precipitating the same downwardly upon screens whose meshes, at each. precipitation, are of requisite dimensions to hold out the larger sized coal in the mass, and allow the smaller sizes to pass through to the pit or general storage place below. From herethey will be again raised and precipitated as occasion demands.

Existing methods include :tew, if any, fa-

the material to said pit, and the angles of the various declivities involved are mainly determined with regard to the points of delivery or screening conditions only rather than with respect to their value or bearing upon the coal disintegration that is to occur. In these methods, therefore, besides the loss occasioned by reason of thanumber and character of the operations themselves, the loss on account of the breakage and degradation of the coal during the process, is soenormous as to make it of great importance that the entire process be simplified to the end, especially, that the Ire-handling of the 59 coal feature shall be minimized and moderated to the fullest degree possible.

it is the obg'ect of the present invention to soreorganize, improve u on and add to the essentiai features of coa screening systems generally, as to, supply a special form of cilities for breaking or modifying the fall of mechanism and resultant combination, that shall go far toward meeting and overcoming the serious deficiencies, in the class of apparatus in question, to which allusion has already been made. ject by the peculiar collocation and structural combination of screens, elevators, conveyers, chutes and subordinate parts that I shall now proceed to more particularly explain. In the drawings, Figure 1 is a side view of the apparatus proper, Fig. 2, an end view of the same in the direction of the arrow in Fig. 1, and, Fig. 3 is a side view of a similar apparatus in connection with an overhead bridge tramway for handling the coal to be screened.

The apparatus as shown, comprises a rigid portal supporting framework that spans two railroad tracks, represented as having cars W and K thereon, ready to receive their loads. The framework includes four corner posts or legs, three of which, marked P and P, appear in the drawings. The posts or legs themselves are each mounted upon fourwheeled trucks T T adapted to travel upon rails r a" that iead to the several points or locations where the apparatus is to be used. Suspended within said framework, from parallei girder-members therein G, Gr and G are three bins B, B and B The bins B and B are of \the parabolic suspension marily deposited for screening. it is at right angles to 1% and B which are located in line with each other. The bin B is subdivided into three compartments or subordinate bins 1, 2 and 3, by transverse partitions indicated by the dotted lines 6 and b in Fig. 1, and, at or near the lower part of each of these compartments is arranged on parallel lines, a pair of right and left'spouts denoted, respectively, by S S, S S and S S. Said spouts are provided at their outer ends with movable sections a, 8, a a and 8*, 8 with chain hoists or other suitable means, it and h for raising and lowering the same and therebyregulating or closing said spouts.

A spout S, similar to and in line with the spouts S, S and S just described, is provided at or near the lower part of the bin B, but in place of a companion spout shaker-screen H, to be further described.

Its upper end or mouth corresponds in outline and relative location with the contour of the screen H which it serves, and its lower or discharge end is connected with and opens into an elevator A at its foot.

.The third bin B is hung from parallel girders G and G at the right of the two bins already described. It is extended downwardly at varying angles by means of a chute D which joins and terminates in the boot 0 near the point where the latter opens into said elevator. The flow of the contents from the bins B and B and from the boot 0, may be governed by slide-gates g and 9 respectively, at the several points of junction of the chutes with the bins, and, by a gate 9 at the lower or discharge end of 0. It will be found of advantage, however, and in line with the general structural scheme of the apparatus, to have these or similar gates at the discharge ends of both C and D, inasmuch as, after the chutes have once been filled a continuous, instead of an abrupt fall or flow of the material outward from these receptacles will thereby be as sured. A short spout D further extends from the lower part of B to a point directly about the inclined rectangular screen H above referred to. Said screen, when in place, is suitably supported in a frame to be oscillated forward and back in guides therein by means, for instance, of eccentrics, attached to a shaft a, driven by an electric motor indicated by M.

The screen itself will be one of a set. of screens adapted to screen and separate the various sizes of coal desired, and be interchangeable on said guides, with the other members of the set as occasion requires.

The screen is intermittently fed from the bin B above, through a sliding gate F by means of suitable oscillating connections between the gate and the motor M as indicated by 0; its lower or discharge end, is arranged to deliver the coal that passes down the screen into a small hopper R, immediately below which, in turn, feeds on to an apron or belt conveyer V that is pivoted to the framework, just beneath said hopper, at p. The conveyer is provided with means for being raised and lowered about its pivot, indicated by k and h, and its discharge end is shown as equipped with sectional extension chutes t and t to further facilitate the delivery of the coal in the cars beneath The conveyer is actuated by aspecial motor M Extending lengthwise beneath the spoutv sections 8, s 8* and s and, in close proximity to the same, is a belt conveyer V having a discharge chute K therefor, at the front end, leading outwardly from the structure, and, a similar chute K at the rear end, that leads inwardly of the same toward the position where a car is to receive its load beneath; the latter chute is preferably provided with an extension apron denoted by 15 that may be raised or lowered toregulate the fall. A second belt conveyer V likewise extends "beneath the spout sections 8, s and .9 parallel with V, with its rear terminal discharging into the chute K, and its front terminal onto an inclined lipscreen H. Said belt-conveyers are adapted to travel in either direction, alternatively, and are driven by a special motor M.

The screen H like H, is interchangeable, with screens of different mesh dimensions and discharges the coal that passes over the same, into the hopper R, and the'coal that passes through the same, into a pan or box 0 beneath the same that empties into the chute C. W,

A is an upright bucket elevator of any suitable formation, situated intermediately of said re-sizing bins B and Bi. Its foot or lower terminal unites and coalesces with the boot 0 at its lowest part so as to take its loads and be fed therefrom. The upper terminal of the elevator is immediately above said bins where it discharges its loads upon a deflecting butter-fly valve N, into one. or the other of the oppositely located lateral chutes or spouts L and L, according to the direction of said valve.

The chute L empties into the bin B, and the chute L, into a cylindrical rotatory screen U, that is 'operatively inclined above the several compartments 1, 2 and 3 of the bin B.

U is a graduated screen, of the. single shell type, in two screen sections u and u, arranged in the reverse order of their mesh dimensions, above the compartments 3 and 2 respectively, and a lower blank section a that empties into compartment 1. These screen sect-ions must conform in-length with the compartments they serve. By the arrangements just described final screenings" only will be separated from the mass and fall throu 'h the section to into the compartment 3, nut only will be screened is effected by revolving the wheel bearings f, f on which it rests, through the common shaft 7*" by motor and gear connection to be provided for the purpose, that are here indicated by M. A motor-M properly con nected with suitable driving'mechanism to actuate the elevator A is indicated at the foot ot't'he elevator in dotted lines.

W andJX are, respectively, a hopper and box car, in position to be loaded by the apparatus. In the latterlof the cars a box-car loader Y, and its exteriorly located controller y, is indicated in dotted lines.

I is" the operators house, and Z the general screenings storage or overflow pile.

In Fig. 3 the apparatus is shown in a fixed and operative relation with a bridge tramway J whose legs J J are affixed to and straddle the portion of the frame-work ot the apparatus that carries the bin B and, together, with said screening devlce composes a complete unitary coal-handling plant."

The shipping and assorting conditions which the apparatus is adapted to meet and serve, are many and varied. A run-of-thepile, or a general screenings shipmentcan always be made by simply dumping the lot to be shipped, into the primary bin B by a bridge tramway, locomotive cranes or other means, and then running it out,

through the short spout D, over a blank (by which the screen H has been replaced) onto the conveyer V to the car. If lump coal is to be shipped from the run-of-the-pile, for instance, and the bin B is empty, the bin B is filled, as before, a suitable sizing screen inserted at H, and the motor M started that oscillates the screen and the sliding gate F, as well as the motors M and M that actuate'the elevator A and screen U. The lump will thereupon run down the screen H to the car, as described, and the balance of the discharge pass through said screen as general screenings into the boot 0 from whence it will. be carried up and discharged through the spout L into U, the valve N having been properly deflected for the purpose. The general screenings will now be deposited into the compartments 1, 2 and 3, according to its constituent sizes of stove, nut and final screenings,

until either the lump shipment is finished,,

or the compartments are filled. The latter condition occurring, the valve N is reversed,

the rotation of U stopped, and the flow of general screenings turned into the reserve bin B. If the bln B or any of the compartments of B is or becomes filled during the lump shipment, room may be made therein for the continued flow of its grade,

by lowering its spout s,s s or s and carrying off what would otherwise be overflow by means of the belt conveyer V to either the car K through the spout K, or, in the opposite direction, through the spout K to the pile Z. If, however, any one of the sizes in bins B and B are to be loaded into a car V, at the same time as the car X is being loaded with lump, the operation first described, will be varied by lowering the proper spout in the compartment of the size selected, so that such size shall flow off as fast as it flows in. This overflow may be carried by V, toward a car \V or X and any overflow, in the meantime, of the other re-- ceptacles fed by the elevator A, may be cared for by opening their discharge spouts above the conveyer V, and allowing their contents to be conveyed to the general pile Z.

Any one of the smaller grades may be loaded directly from its special compartment by letting it flow out through the appropriate spout upon the conveyer V, which will carry thesame, as desired, either to the chute K, and car \V, at one side, or to the apron conveyer V and the car X, on the other. Any two grades may be simultaneously shipped from such compartments by likewise allowing a discharge from one compartment to fall on the conveyer V and be loaded into the car X and, from the other, on the conveyer Vto be loaded in the car W Stove may be separated and loaded from the general screenings pile Z, by using a 1% inch mesh in the screen H and running the general screenings through the bin B In this case the resulting screenings will fall into the boot 0 and be taken up by the elevator and re-sized through the-screen U. In the foregoing instances it is understood, of course, that, When coal is to pass over a screen like H in its travel to a car, a blank or a screen with smaller sized meshes than the coal,will be in place at HQ The above instances are intended to be explanatory and illustrative only of the operation and capabilities of the apparatus in question, and not as defining its limitation Other combinations and uses of the same l u will become manifest on reflection or after some experience in the actual operation of the machine.

Having described said invention What I claim and desire to secure by Letters Patcut is 1. In a coal handling apparatus the combination of a primary bin, resizing bins, a general screenings bin, and a loading chute wit-ha screening device adapted to receive coal from the primary bin' and discharge into the loading chute, means for conveying the screenings from said screening device to a chute, a valve in said chute to direct said screenings into either the general screenings bin or into a resizing screen which latter is adapted to discharge several grades of the coal respectively into resizing bins.

2. In a coal handling apparatus the combination of a primary bin, resizing bins, a

general screenings bin, and a loadingchute with a screening device adapted to receive coal from the primary bin and discharge into a loading chute, means for conveying the screenings 'from said screening device to a chute, a valve in said chute to direct said screenings into either the general screenings bin or into a resizing screen'which latter is adapted to discharge several grades of coal respectively into the resizing bins, means adapted to receive coal from said general screenings and resizing bins and convey and deliver the same at points below, and means for accordingly drawing OE and discharg ing coal from said bins into said conveying means, substantially as shown and described.

3. In a coal handling apparatus the combination of a primary bin, resizing bins, a general screenings bin, and a loading chute with a screening device adapted to receive coal from the primary bin and discharge scribed.

4. In a coal handling apparatus, the combination of a primary bin, resizing bins, and a screening device adapted to receive coal from the primary bin, a loading chute adapted to receive the discharge from the screening device, means for elevating the screenings from said screening device, a resizing screen to receive the.- screenings from said elevating means, which latter is adapted to discharge several grades of the coal respectively into said resizing bins, and a common frame-work for supporting said devices, substantially as shown and described.

5. In a coal handling apparatus, the combination of a primary bin, resizing bins, and a screening device adapted to receive coal from the rimary bin and discharge into a loading c-ute, means for conveying the screenings from said screening device to a resizing screen, which latter is adapted to discharge several grades of the coal, respectively into said resizing bins, means adapted to receive coal from said resizin bins and convey and deliver the same at points below, and means for accordingly drawing off and discharging coal from said bins into said conveying means, substantially as shown and described.

'L. P. LIPrs,

C. S. MALTBIE. 

